Current mode update

This commit updates owntech modules which are necessary for the current mode.

Update of HRTIM module

• Deleting unnecessary LL function generated by cubeMX.

Update of DAC module

• Adding more trigger for sawtooth generation.
• Adding "External and Internal" mode for DAC output mode.

Update of comparator

• Comparator 1 is now linked to DAC3 and comparator 3 to DAC1.

The instruction to use the API for current mode is here, a test code is provided.